MRI: Acquisition of a Multicollector Inductively Coupled Plasma Mass Spectrometer and Laser System for Investigating the Evolution of the Earth's Climate, Oceans, and Tectonics

MRI：购买多接收器电感耦合等离子体质谱仪和激光系统，用于研究地球气候、海洋和构造的演变

• 批准号: 1626244
• 负责人: Erin Roark
• 金额: $ 100.02万
• 依托单位: Texas A&M University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-15 至 2021-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1626244&HistoricalAwards=false
• 关键词: MRI; Acquisition; Multicollector; Inductively; Coupled

This award provides funding for the acquisition of a new state of the art Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometer system (LA-MC-ICPMS) to be incorporated into the expanding Ken Williams Radiogenic Isotope Geosciences Laboratory at Texas A&M University. The instrumentation will be used by an interdisciplinary group of researchers across Texas A&M University, the International Ocean Discovery Program, Texas A&M Corpus Christi, and Texas A&M University Galveston to address transformative and interdisciplinary questions in climate, biogeochemistry, environmental change, and tectonics. Specific research topics include: 1) novel transition metal isotope measurements such as iron, zinc, and cadmium as a tracer of oceanic metal cycling; 2) understanding how isotope and trace element tracers can be used to understand the relationship between past climate change and past oceanic biological productivity, deep-ocean circulation, and patterns of continental aridity and hydrology; 3) expanding geochronology research capabilities using new methods in uranium series dating; 4) using boron and neodymium isotope measurements in carbonates to reconstruct oceanic and atmospheric circulation changes and seawater pH histories. The diverse team of early career and experienced faculty along with their students will use this instrumentation to transform our understanding of the way our planet works at the surface (biosphere, hydrosphere and atmosphere) and at depth (lithosphere). We intend to engage large numbers of undergraduate and graduate students in cutting-edge STEM training using state-of-the-art instrumentation through both research experiences and high-impact teaching opportunities that provide hands on training in the use of clean room laboratory techniques and in the operation of the mass spectrometer.This award provides funding for the acquisition of a Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometer system (LA-MC-ICPMS) to be housed in the Ken Williams Radiogenic Isotope Geosciences Laboratory at Texas A&M University. The MC-ICPMS instrument comprises an ICP source, a magnetic sector mass analyzer, and an array of multiple detectors that allows for the simultaneous measurement of multiple isotopes. This static isotope ratio measurement results in a precision far superior to that obtained by sequential isotope measurement by single collector ICPMS. Laser ablation (LA) is a widely used sampling method for in-situ ICPMS analyses of solid samples that are either difficult to digest or where resolution of spatial relationships within sampled micro-domains is critical. The laser system includes the HelEx sample chamber necessary to produce stable signals and reproducible ablation effects. The instrumentation will be used by an interdisciplinary group of researchers to address questions in climate, biogeochemistry, environmental change, and tectonics. Principle investigator projects will focus on 1) novel transition metal isotope measurements as a tracer of oceanic metal cycling; 2) understanding how isotope and trace element tracers can be used to understand the relationship between past climate change and past oceanic biological productivity, deep-ocean circulation, and patterns of continental aridity and hydrology; 3) expanding geochronology research capabilities using new methods for "petrochronology" by split-stream ICPMS and trace-element screening of zircons for high-precision U-Pb dating; 4) U/Th dating and boron isotope measurements in deep-sea corals to reconstruct ocean ventilation and seawater pH histories; 5) Nd isotopes as a tracer of oceanic and atmospheric circulation.

该奖项提供资金，用于收购最先进的激光烧蚀多接收器电感耦合等离子体质谱仪系统（LA-MC-ICPMS），该系统将被纳入德克萨斯州A M大学扩展的Ken威廉姆斯放射性同位素地球科学实验室。该仪器将由德克萨斯A M大学，国际海洋发现计划，德克萨斯A M Corpus Christi和德克萨斯A M大学加尔维斯顿的跨学科研究人员小组使用，以解决气候，地球化学，环境变化和构造方面的变革性和跨学科问题。具体研究课题包括：1）新的过渡金属同位素测量，如铁，锌和镉作为海洋金属循环的示踪剂; 2）了解同位素和微量元素示踪剂如何用于了解过去气候变化与过去海洋生物生产力，深海环流，大陆干旱和水文模式之间的关系; 3）利用铀系定年的新方法扩大地质年代学研究能力; 4）利用碳酸盐中的硼和钕同位素测量重建海洋和大气环流变化以及海水pH历史。早期职业和经验丰富的教师沿着与他们的学生的多元化团队将使用这种仪器来改变我们对地球在表面（生物圈，水圈和大气层）和深度（岩石圈）工作方式的理解。我们打算通过研究经验和高影响力的教学机会，让大量本科生和研究生参与使用最先进仪器的尖端STEM培训，提供使用洁净室实验室技术和操作的实践培训。质谱仪。该奖项为收购激光烧蚀多功能质谱仪提供资金收集器电感耦合等离子体质谱仪系统（LA-MC-ICPMS）将安装在得克萨斯州农工大学的肯威廉姆斯放射性同位素地球科学实验室&。 MC-ICPMS仪器包括ICP源、磁扇区质量分析器和允许同时测量多种同位素的多个检测器的阵列。这种静态同位素比测量的精度远远上级单收集器ICPMS连续同位素测量的精度。激光烧蚀（LA）是一种广泛使用的采样方法，用于固体样品的原位ICPMS分析，这些固体样品要么难以消化，要么采样微区内空间关系的分辨率至关重要。激光系统包括产生稳定信号和可再现烧蚀效果所需的HelEx样品室。跨学科研究人员小组将使用这些仪器来解决气候、生物地球化学、环境变化和构造方面的问题。主要研究项目将侧重于1）新的过渡金属同位素测量作为海洋金属循环的示踪剂; 2）了解同位素和微量元素示踪剂如何用于了解过去气候变化与过去海洋生物生产力，深海环流以及大陆干旱和水文模式之间的关系; 3）利用分流式ICPMS和高精度U-Pb测年的锆石微量元素筛选等“岩石年代学”新方法，扩大了地质年代学研究能力; 4）深海珊瑚中的U/Th定年和硼同位素测量，以重建海洋通风和海水pH值的历史; 5）Nd同位素作为海洋和大气环流的示踪剂。